Add two coordinates in a button function to launch mapKit and start navigation between two points (Swift) - ios

Question

I'm using this class
import UIKit
import CoreLocation
import GoogleMaps
import GooglePlaces
import SwiftyJSON
import Alamofire
import MapKit
class FinalClass: UIViewController {
#IBOutlet weak var containerView: UIView!
#IBOutlet weak var bottomInfoView: UIView!
#IBOutlet weak var descriptionLabel: UILabel!
#IBOutlet weak var distanceLabel: UILabel!
var userLocation:CLLocationCoordinate2D?
var places:[QPlace] = []
var index:Int = -1
var locationStart = CLLocation()
var locationEnd = CLLocation()
var mapView:GMSMapView!
var marker:GMSMarker?
override func loadView() {
super.loadView()
}
override func viewDidLoad() {
super.viewDidLoad()
guard index >= 0, places.count > 0 else {
return
}
let place = places[index]
let lat = place.location?.latitude ?? 1.310844
let lng = place.location?.longitude ?? 103.866048
// Google map view
let camera = GMSCameraPosition.camera(withLatitude: lat, longitude: lng, zoom: 12.5)
mapView = GMSMapView.map(withFrame: self.view.bounds, camera: camera)
mapView.autoresizingMask = [.flexibleHeight, .flexibleWidth, .flexibleTopMargin, .flexibleBottomMargin, .flexibleLeftMargin, .flexibleRightMargin]
self.containerView.addSubview(mapView)
// Add gesture
addSwipeGesture()
didSelect(place: place)
if userLocation != nil {
addMarkerAtCurrentLocation(userLocation!)
}
}
func addSwipeGesture() {
let directions: [UISwipeGestureRecognizerDirection] = [.right, .left]
for direction in directions {
let gesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(sender:)))
gesture.direction = direction
self.bottomInfoView.addGestureRecognizer(gesture)
}
}
func addMarkerAtCurrentLocation(_ userLocation: CLLocationCoordinate2D) {
let marker = GMSMarker()
marker.position = userLocation
marker.title = "Your location"
marker.map = mapView
}
func didSelect(place:QPlace) {
guard let coordinates = place.location else {
return
}
// clear current marker
marker?.map = nil
// add marker
marker = GMSMarker()
marker?.position = coordinates
marker?.title = place.name
marker?.map = mapView
mapView.selectedMarker = marker
moveToMarker(marker!)
// update bottom info panel view
let desc = place.getDescription()
descriptionLabel.text = desc.characters.count > 0 ? desc : "-"
distanceLabel.text = "-"
// update distance
if userLocation != nil {
let dist = distance(from: userLocation!, to: coordinates)
distanceLabel.text = String.init(format: "Distance %.2f meters", dist)
self.drawPath(startLocation: userLocation!, endLocation: coordinates)
}
title = place.name
}
func moveToMarker(_ marker: GMSMarker) {
let camera = GMSCameraPosition.camera(withLatitude: marker.position.latitude,
longitude: marker.position.longitude,
zoom: 12.5)
self.mapView.animate(to: camera)
}
// distance between two coordinates
func distance(from: CLLocationCoordinate2D, to: CLLocationCoordinate2D) -> CLLocationDistance {
let from = CLLocation(latitude: from.latitude, longitude: from.longitude)
let to = CLLocation(latitude: to.latitude, longitude: to.longitude)
return from.distance(from: to)
}
func handleSwipe(sender: UISwipeGestureRecognizer) {
guard index >= 0, places.count > 0 else {
return
}
if sender.direction == .left {
if index < places.count - 2 {
index += 1
didSelect(place: places[index])
}
} else if sender.direction == .right {
if index > 1 {
index -= 1
didSelect(place: places[index])
}
}
}
func drawPath(startLocation: CLLocationCoordinate2D, endLocation: CLLocationCoordinate2D) {
let from = CLLocation(latitude: startLocation.latitude, longitude: startLocation.longitude)
let to = CLLocation(latitude: endLocation.latitude, longitude: endLocation.longitude)
let origin = "\(from.coordinate.latitude),\(from.coordinate.longitude)"
let destination = "\(to.coordinate.latitude),\(to.coordinate.longitude)"
let url = "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin)&destination=\(destination)&mode=driving"
Alamofire.request(url).responseJSON { response in
print(response.request as Any) // original URL request
print(response.response as Any) // HTTP URL response
print(response.data as Any) // server data
print(response.result as Any) // result of response serialization
let json = JSON(data: response.data!)
let routes = json["routes"].arrayValue
// print route using Polyline
for route in routes
{
let routeOverviewPolyline = route["overview_polyline"].dictionary
let points = routeOverviewPolyline?["points"]?.stringValue
let path = GMSPath.init(fromEncodedPath: points!)
let polyline = GMSPolyline.init(path: path)
polyline.strokeWidth = 4
polyline.strokeColor = UIColor.black
polyline.map = self.mapView
}
}
}
#IBAction func navigationStart(_ sender: Any) {
}
with a google maps to add place markers, draw the direction on the map and show the distance between two points, now i would like to launch the navigator between startLocation: userLocation! and endLocation: coordinates but with some research i saw that i can not launch the navigator in the same view, i need to open the maps application, so i decided to add the MapKit and a button
#IBAction func navigationStart(_ sender: Any) {
}
so how can i do that by pressing the button the map application opens with direction from userLocation to coordinates ? I already looked to similar question but is a little different to my problem, because i already have the points but in different format.

Answer 1

Your question is a little confusing but if you want to open the maps app and show direction from a user's current location to another point on the map then you don't need to pass the user's location, just the destination:
Swift 4:
let coordinate = CLLocationCoordinate2DMake(51.5007, -0.1246)
let placeMark = MKPlacemark(coordinate: coordinate)
let mapItem = MKMapItem(placemark: placeMark)
mapItem.name = "Big Ben"
mapItem.openInMaps(launchOptions: [MKLaunchOptionsDirectionsModeKey: MKLaunchOptionsDirectionsModeDriving])
Objective C:
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(51.5007, -0.1246);
MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate: coordinate];
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placemark];
[mapItem setName:#"Big Ben"];
[mapItem openInMapsWithLaunchOptions:#{MKLaunchOptionsDirectionsModeKey: MKLaunchOptionsDirectionsModeDriving}];